<template>
    <div class="icons">
        <swiper :options="swiperOption">
            <swiper-slide v-for="(page,index) of pages" :key="index">
                <div class="icon" v-for="item in page" :key="item.id">
                    <div class="icon-img">
                        <img class="icon-img-content" :src="item.imgUrl">
                    </div>
                    <p class="icon-desc">{{item.desc}}</p>
                </div>
            </swiper-slide>
        </swiper>          
    </div>
</template>
<script>
export default {
  name: 'HomeIcons',
  props:{
      list:Array
  },
  data () {
      return {
          swiperOption:{
              autoplay:false
          }
      }
  },
  computed:{  //自带缓存
    pages () {
        const pages = []
        this.list.forEach((item,index)=>{
            const page = Math.floor(index / 8) //Math.floor向下取整
            if(!pages[page]){  //pages[page]不存在的情况下
                pages[page] = []
            }
            pages[page].push(item)            
        })
        return pages
    }
  }
}
</script>
<style lang="stylus" scoped>
@import '~styles/varibles.styl'
@import '~styles/mixins.styl'
.icons >>> .swiper-container    
    height:0  // overflow:hidden这是swiper自带的
    padding-bottom: 50%
.icons
    margin-top:.1rem    
    .icon
        position:relative
        overflow:hidden
        float:left
        width:25%
        height:0
        padding-bottom: 25%    
        .icon-img
            position:absolute
            top: 0
            left: 0
            right: 0
            bottom:.44rem
            box-sizing: border-box
            padding:.1rem           
            .icon-img-content
                display:block
                margin:0 auto
                height:100%
        .icon-desc
            position:absolute           
            left: 0
            right: 0
            bottom: 0
            height:.44rem
            line-height:.44rem 
            text-align:center
            color: $darkTextColor
            ellipsis() 
</style>